YOKOGAWA av550g, User Manual

Page: 112 / 213

<8. Detailed Data Setting>
8-3
IM 11M12D01-01E
8.1.2 Setting Output Hold (Applies to All Outputs)
During warmup, during calibration, and when an error occurs, output hold status applies: the analog
output is held at a preset value. In this instrument, the permissible hold values which may be set are
shown in Table 8.1 . The hold setting applies to the outputs of all channels.
[Warmup], [Calibration / Indication check / Blow back], or [Error] statuses may occur independently
for each channel; only the outputs of any channels in these statuses are in [HOLD] status. However
the [Error] status, [Control Card Abnormal], causes *all* the individual channel outputs and *all* the
averaging outputs to be in [HOLD] status. Both [(Under) Maintenance] and [Process Gas Alarm]
statuses also apply to the whole system and cause *all* the individual channel outputs and *all* the
averaging outputs to be in [HOLD] status.
“Averaging Group Invalid” status applies to individual averaging groups;
it means that either no channels are assigned to an averaging group, or that the status of all channels
in the averaging group is set to “disabled”; and the output of groups in this status will be in HOLD
status.
CAUTION
[Disable] means setting channel card power “OFF” so that card may be swapped. Refer to “Section
11.2 Hot Swap Function”.
Table 8.1
Status
4mA 20mA Don’t
hold
Hold last
value
Preset value
(2.4-21.6mA)
Warmup, Purging
  
(Under) Maintenance
  
(Under) Calibration
  
Indication Check
Blow back
Process Gas Alarm
 
Error
  
Averaging Group Invalid
  
< Definition of Statuses >
1) Warmup period, Purging
Warmup period means the status from power on until cell temperature stabilizes at 750° C and the
instrument switches to measurement mode. The basic panel display shows cell temperature during
warmup period.
“Purging” is the passing of calibration gas through the calibration gas piping before warmup, to
remove any condensate in the piping. Refer to Section 10.6 Purging. Warmup does not start until after
purging ends.
2) (Under) Maintenance
“Under maintenance” is the time that starts when you move to the [Execution/Setup] display by
touching the Setup key on the basic panel display and ends when you return to the basic panel
display. It includes when you operates keys on lower level menu displays of the [Execution/Setup]
display.
Valid output
hold values